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n this map of white voters in the 2012 presidential election, the green circles represent counties with higher gender gaps than the U.S. average, and the purple circles, gender gaps lower than the average. The brighter the color, the larger the deviation from the average. Estimates are based on a model fit to survey data. This data visualization follows the principles of exploratory data analysis but is based on a fitted model, rather than raw data, using computer-intensive methods. Credit: Yair Ghitza and Andrew Gelman.